Submission #1276989

#TimeUsernameProblemLanguageResultExecution timeMemory
1276989icebearLongest beautiful sequence (IZhO17_subsequence)C++20
23 / 100
6091 ms1740 KiB
// ~~ icebear ~~ #include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int, int> ii; typedef pair<int, ii> iii; template<class T> bool minimize(T &a, const T &b) { if (a > b) return a = b, true; return false; } template<class T> bool maximize(T &a, const T &b) { if (a < b) return a = b, true; return false; } #define FOR(i,a,b) for(int i=(a); i<=(b); ++i) #define FORR(i,a,b) for(int i=(a); i>=(b); --i) #define REP(i, n) for(int i=0; i<(n); ++i) #define RED(i, n) for(int i=(n)-1; i>=0; --i) #define MASK(i) (1LL << (i)) #define BIT(S, i) (((S) >> (i)) & 1) #define mp make_pair #define pb push_back #define fi first #define se second #define all(x) x.begin(), x.end() #define task "icebear" const int MOD = 1e9 + 7; const int inf = 1e9 + 27092008; const ll INF = 1e18 + 27092008; const int N = 1e5 + 5; int n, a[N], c[N], f[N], trace[N]; void init(void) { cin >> n; FOR(i, 1, n) cin >> a[i]; FOR(i, 1, n) cin >> c[i]; } void process(void) { FOR(i, 1, n) { f[i] = 1; trace[i] = -1; FOR(j, 1, i - 1) if (__builtin_popcount(a[i] & a[j]) == c[i]) { if (maximize(f[i], f[j] + 1)) trace[i] = j; } } int j = max_element(f + 1, f + n + 1) - f; vector<int> ans; while(j > 0) { ans.pb(j); j = trace[j]; } reverse(all(ans)); cout << ans.size() << '\n'; for(int x : ans) cout << x << ' '; cout << '\n'; } int main() { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); if (fopen(task".inp", "r")) { freopen(task".inp", "r", stdin); freopen(task".out", "w", stdout); } int tc = 1; // cin >> tc; while(tc--) { init(); process(); } return 0; }

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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